Balance-valve.



B. F. OBRYANT.

BALANCE VALVE. APPLIOATION FILED MAR.Ii, 190B.

- 910,225. Patented Jan. 19, 1909-.

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BALANCE VALVE. APPLICATION FILED HAILH, 1908.

910,225. Patented Jan. 19,1909.

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Wl-TNE SSE S v By ATTORNEYS B. F. OBRYANT.

BALANCE VALVE. APPLICATION IILED MAR.11,1908.

910,225, Patented Jan. 19, 1909.

A TTOHNEYS "(UNITED STATES. PA I OFFICE BEN F. OlBRYANT, OF C OLLINSVILLE, ALABAMA, ASSIGNOR OF ONE-HALF TO WARREN HARPER, OF COLLINSVILLE, ALABAMA.

BALANCE-VALVE.

Specification of LettersPatent.

Patented Jan. 19, 1909.

Application filed March 11, 1908. Serial No. 420,408.

Improved Balance-Valve, of which the following is a full, clear, and exact description. Th object of the invention is to provide a new and improved balance valve, more especially designed .for use in locomotive engines, and arranged to insure an easy movement of the valve when the engine is running or "dead, and without danger of bonding, and to allow of conveniently and.

quickly replacing a worn out bushing in which the controlling piston valve travels.

The invention 'consists of novel'features and parts and combinations of the same,

' which will be more fully described herein after and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a longitudinal sectional elevation of the improvement as applied; Fig. 2 is a transverse section of the same on the 'line 2-2 of Fig. 1; Fig. 3 is aninverted plan view of the steam chest, the heads being removed; Fig. 4 is a side elevation of the piston valve; Fig. 5 is a longitudinal sectional elevation of the steam chest, the heads being removed, and Fig. 6 is an end view of The steam chest A is secured by bolts B to the engine cylinder C of the usual construction, and having the cyhnderports a and b and'the exhaust port 0. In the steam chest A is arranged a transversely-extending integral; partition D, preferably made arch shaped, as plainly indicatedin Fig. 2, so as to formwith the inner wall of the steam chest A, longitudinally-extending channels A,;to connect the ends ofthe steam chest with each other. .The partition D forms the valve chest proper and is provided with a longitudinally-extending bore E, into which fits a bushing F, projecting with its ends slightly beyond the faces of the arch-shaped partition D, as plainly indicated in Figs. 1, 3 and 5. In the bushing F is mounted to reciprocate the piston valve G, mounted to turn loosely on and moving with the valve stem H extending through a suitable stuffing box I in the head J for closing one end of the steam chest A, the other end of the steam chest being closed by a head J. The valve stem H is connected in the usual manner with thevalve gear, for imparting a reciproeating motion to the piston valve G. The piston valve G is provided with piston heads G, G having suitable packing rings K in their peripheral faces, and the said piston heads G, G are integrally connected with each other by the reduced middle portion G mounted on the stem H, and having a central channel Gr connected at its ends bybranch channels G G with the hollowedout ends G G of the piston headsG, G as plainly indicated in Fig. 1. On the stem H is secured or formed a collar H abutting against the left-hand end of the middle portion Gr within the hollowed-out or recessed end G and on the terminal of the stem H screw nuts H extending within the recessed end G and abutting against the right-hand end of the middle portion G to connect the piston valve G with the stem H, but to allow the piston valve G to turn loosely on the stem so as to wearevenly. By having the channel G and the branch channels G G steam can circulate from one end of the steam chest to the other, in addition to the channels A above referred to.

The cylinder ports a and I; register with the ports (Z and 6 formed in the partition D, which. is also provided with a port f in register with the exhaust port 0.. The ports d, c and f in the partition D register with corresponding ports g, 71 and 2' formed in the bushing F, and the bushing ports are controlled by the piston heads G, G so as to control the steam passing to andfrom the cylinder C in the same manner as in engines provided with the ordinary slide valve.

In order to lubricate the cylinder, the

lubricant is passed by a pipe L into the bushing F near the ends thereof, the said pipe L being connected with a suitable oil cup L, as indicated in Fig. 1.

A relief valve N of any approved construction is connected with the steam chest head J, and the joint between the bottom faceof the steam chest A and the corresponding face of the cylinder C is rendered steam-tight by interposing packing wires 0, as plainly shown in Figs. 1 and 2. The steam enters the steam chest A by the usual channels P formed in the cylinder C and A adjacent to the faces of the partition D, l

'by having connecting with the ends of the steam chest 1 and by the arrangement described the steam i can readily pass from one end of the steam chest A ,to the other by way of the channels Gr", G, G and A, as before explained. I

Now when the engine is running, the piston valve G controls the admission and exhaust of the steam to and from the cylinder C, and the valve G in the form of a pis ton valve, it is evident that it is completely balanced, and consequently the valve reciprocates easily within the bushing F. In case the bushing F becomes worn out, it can be readily replaced by a new one without discarding the steam chest A.

The usual slide va'lve now used in locomotive engines, can be readily replaced when worn out by the arrangement above described and shown in the drawing, that is, the locomotive engines can be quickly refitted with new valves whenever deemed necessary and hence the locomotive is again ready for service in a short time.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1, An engine provided with a steam chest, having a transverse partition provided with a longitudinal bore and with longitudinal channels connecting the ends of the steam chest with each other, a bushing fitting the said bore, the said bushing and partition having registering ports registering with the ports of the engine cylinder, and a piston valve mounted to slide in the said bushing and having spaced piston heads for controlling the said ports and longitudinal openings for the passage of steam therethrough. I 2. 11 engine provided with a steam chest, havlng a transverse partition provided with l a longitudinal bore, said partition being arch-shaped and forming with the inner wall of the steam chest longitudinal passages connecting the ends of the steam chest w1th each other, a piston valve in said bore, and a stem for moving the piston valve forward and backward and on which stem the said piston valve is mounted to turn freely.

3. An engine provided with a steam chest, having a transverse partition provided with a longitudinal bore and with lo itudinal channels for connecting the ends 0 the said steam chest with each other,- a bushing fitting the said bore, the said bushing and partition having registering ports registering with the ports of the engine cylinder, and a piston valve mounted to slide in the said bushing and having spaced piston heads for controlling the said ports a central channel and branch channels leading therefrom out through the ends of the piston heads.

4. An engine provided with a steam chest, having a transverse partition provided with a longitudinal bore, a bushing fitting the said bore, the said bushing -and partition having registering ports reglstering with the ports of the engine cylinder, and a piston valve mounted to slide in the said bushing and having spaced piston heads for controlling the said ports, the said piston valve being mounted to turn freely on its stem, and the said piston valve having longitudinal openin s, hollowed out ends, a central channel an branch channels leading therefrom out through said ends. 7

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses;

BEN F. OBRYANT. lrVitnesses Soo'r'r Nrononsox, P. G. SMITH. 

